package com.sky.service.impl;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;
import java.time.LocalDateTime;
import java.util.UUID;


@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }


        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex((password+employee.getSalt()).getBytes());
        System.out.println(password);
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    public void add(EmployeeDTO employeeDTO) {
        //将前端请求数据转移到员工实体类
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
        //设置账号的状态，默认正常状态 1表示正常 0表示锁定
        employee.setStatus(StatusConstant.ENABLE);
        //添加基本参数
        //employee.setCreateTime(LocalDateTime.now());
        //employee.setUpdateTime(LocalDateTime.now());
        //Long empId = BaseContext.getCurrentId();
        //employee.setCreateUser(empId);
        //employee.setUpdateUser(empId);
        //设置默认密码 加盐加密
        String salt = UUID.randomUUID().toString().replace("-", "");
        System.out.println(salt);
        employee.setPassword(DigestUtils.md5DigestAsHex((PasswordConstant.DEFAULT_PASSWORD +salt).getBytes()));
        employee.setSalt(salt);
        employeeMapper.inster(employee);

    }

    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        //1.使用分页插件,设置分页参数
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        //2.执行条件查询
       Page<Employee> emplist = employeeMapper.getPageByName(employeePageQueryDTO.getName());
        PageResult  pageResult = new PageResult();
        pageResult.setRecords(emplist.getResult());
        pageResult.setTotal(emplist.getTotal());


        return pageResult;
    }

    @Override
    public void starOrstop(Long status, Integer id) {
        employeeMapper.updateStatus(status,id);

    }

    @Override
    public Employee getById(Long id) {
      Employee employee =  employeeMapper.getById(id);
        return employee;
    }

    /**
     * 修改员工
     * @param employeeDTO
     */
    @Override
    public void updateEmp(EmployeeDTO employeeDTO) {
        //将前端请求数据转移到员工实体类
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
        //添加基本参数
        employee.setUpdateTime(LocalDateTime.now());
        Long empId = BaseContext.getCurrentId();
        employee.setUpdateUser(empId);
        employeeMapper.updateEmp(employee);
    }



}
